Ever since the surgery, Kate has been troubled by a never-ending persistent earworm on a short loop. We are now trying to identify the song, in hopes that hearing the whole thing might help to break the cycle.
It’s a pop song from maybe 5-8 years ago. It has two male vocalists. One is singing, or perhaps chanting, in English; the other is singing, or perhaps chanting, in a “whiny kind of wail” in some indigenous language. The indigenous guy is, she thinks, some kind of sample or anthropological recording and there might have been some kind of controversy a while ago about the rights to it. The song is fairly upbeat in meter and tone.
The name of the song might perhaps be something like “Nirvana” or “Nihata.”
EDIT: A suggestion on LiveJournal by user “crazysoph” was not quite correct, but it was close enough for me to come up with the tune… though not a title. However, a Google search for “song indian ay yay yai ya hai ya yai” led to a question on Yahoo Answers which led to the answer: it is “Return to Innocence” by Enigma (https://www.youtube.com/watch?v=Rk_sAHh9s08). Thanks, all, for your suggestions!